Power-transmission device.



No. 795,386. PATENTED JULY 25, 1905. -G. A. CUTTER.

POWER TRANSMISSION DEVICE.

APPLICATION FILED SEPT. 28.1903.

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UNTTED STATES PATENT @TTTCE.

POWER-TRANSMISSION DEVICE.

Specification of Letters Patent.

Patented July 25, 1905.

Application filed September 28, 1903. Serial No. 174,841.

To all 1071/0727, it may concern:

Be it known that I, GEORGE A. CUTTER, a citizen of the United States of America, residing at Nashua, in the county of Hillsboro and State of New Hampshire, have invented certain new and useful Improvements in Power- Transmission Devices, of which the following is a specification.

The object of the invention is to produce a device of the class specified having features of novelty and advantage.

The invention is applicable as a driving means for automobiles and similar vehicles as well as to shafting and the like.

In the drawing 1 have illustrated an embodiment of my invention which would be applicable to automobiles, and I will describe my invention with reference thereto.

M is an explosion-motor or other source of power having its connecting-rod connected to the shaft T.

Z is one member of a differential gear,which is keyed to the shaft T. The member Z has the arms 1 2, to which are secured the beveled pinions V V, free to rotate on the studs U is a second member of the differential gear and is a bevel-gear loosely mounted on the shaft T and meshing with the pinions V V. The shaft T has a rotation always in one direction, as right-handed. The gear U has a right-handed rotation, the speed of which is controlled by the variable-speed device, comprising the disks I J, mounted on the shaft L, and the disks R S. mounted on the shaft T, these disks being connected by the drivingchain K, the shaft L being connected with the driving-gear U through the chain H.

The variable-speed device, comprised of the disks 1 J R S, chain K, and the shifting levers, is similar to that described and claimed in an application for patent, serially num It is a property of the differential gear shown and described that when the arm member Z is rotated at a certain speed in one direction and the second member U is rotated in the same direction at a different speed the speed of the third member X may be varied from zero to a speed in either direction of rotation, depending on the relation of the speeds of Z and U.. For instance, let U and X both have the same number of teeth. It is then a fact that if Z moves one hundred revolutions per minute right-handed and U tWo hundred revolutions per minute right-handed X will stand still that is, it will not rotate. If the speed of Z is constant at one hundred revolutions per minute right-handed and that of U is increased above two hundred revolutions per minute, then X rotates left-handed, While if U moves less than two hundred revolutions per minute right-handed then X r0- tates right-handed.

The power to drive a vehicle may be taken from member X in any desired manner, as from the sprocket \V.

The lever B may be provided with the usual pawl cooperating with the rack A, which for convenience may be marked to indicate the position of the lever when the carriage is in a state of rest and position of the lever corresponding to different speeds, both forward and backward, as is customary.

The operation of the device Will be clear from the above. and thus the speed of the gear X, will be controlled by the lever B, by means of which the variable-speed device'I J R S is controlled. It will be seen that the motor may have a constant speed and that in spite of this the vehicle may stand still or move at any speed ed on said motor-shaft and oppositely ar- The speed of the gear U,

ranged, one of said members being connected with said second shaft and the other adapted to be connected with the driving-wheels of a vehicle; a differential-gear member keyed to said motor-shaft and intermeshing with said other two differential -gear members; and means for operating said expansible pulleys.

In testimony whereof Iafiix my signature in presence of two witnesses.

GEORGE A. CUTTER.

\Vitnesses:

B. A. PEAsE, J AMES H. HUNT. 

